CN114673385A - Large eccentric demonstration screen fixing structure adopting light high-strength steel and building process - Google Patents
Large eccentric demonstration screen fixing structure adopting light high-strength steel and building process Download PDFInfo
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Abstract
The invention provides a super-high overweight eccentric demonstration large screen fixing structure constructed by adopting light high-strength steel and a construction process. Adopt super high overweight eccentric demonstration large-size screen fixed knot structure of light high strength steel construction, including the middle part steel construction, the left side overlap joint of middle part steel construction has left side main screen dish to detain the frame, and the left side main screen dish of detaining the frame is detained in the left sideThe overlap joint has left side passageway steel structure frame, the right side overlap joint of middle part steel construction has the main screen dish in right side to detain the frame, the right side overlap joint that the frame was detained to the main screen dish in right side has right side passageway steel structure frame. The invention integrally uses galvanized light high-strength steel as construction material, meets the functions of lightning protection and structural strength requirement, has outstanding corrosion resistance, ensures the arrangement requirement of a large-scale ultrahigh overweight eccentric demonstration large screen after construction, and has site foundation bearing capacity not more than 10t/m2The requirement of (3) is that a vehicle channel is reserved below the structure, and normal traffic cannot be delayed after the vehicle channel is erected.
Description
Technical Field
The invention relates to the field of light high-strength steel materials and construction thereof, in particular to an ultrahigh overweight eccentric demonstration large screen fixing structure built by adopting the light high-strength steel materials and a building process.
Background
When carrying out some large-scale literary and artistic performances, the buildding of its stage is very important, not only need consider the result of use after buildding when buildding, more need consider the feasibility and the security of buildding the process, at the in-process of buildding of the huge screen of overweight eccentric demonstration of current superelevation, the condition that the in-process steel structure frame of buildding takes place to warp often can appear, so often consolidate many times of following in the buildding process, this just causes a large amount of materials extravagant while also having delayed the progress of buildding, the steel structure frame of traditional steel buildding still has whole weight big in addition, the structure bearing capacity is poor, the problem of structural stability is poor, consequently, it is very frequent to build the after accomplishing maintenance.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a super-high overweight eccentric demonstration large screen fixing structure built by adopting a light high-strength steel material and a building process, and solves the problem of building a steel structure of the super-high overweight eccentric demonstration large screen.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a super-high overweight eccentric demonstration large screen fixing structure built by adopting a light high-strength steel material and a building process thereof comprise a middle steel structure, wherein a left main screen panel buckling frame is lapped on the left side of the middle steel structure, a left channel steel structure frame is lapped on the left side of the left main screen panel buckling frame, a right main screen panel buckling frame is lapped on the right side of the middle steel structure, and a right channel steel structure frame is lapped on the right side of the right main screen panel buckling frame;
a middle operation boarding path is arranged on the front side of the middle steel structure, a hollow channel is arranged in the middle of the middle steel structure, and a lifting mechanism is arranged inside the hollow channel;
the display screens are arranged on the front sides of the middle steel structure, the left main screen panel buckling frame, the left channel steel structure frame, the right main screen panel buckling frame and the right channel steel structure frame;
an operator walkway is arranged at the front side of the left main screen panel buckling frame and the right main screen panel buckling frame and is positioned at the rear side of the display screen, the operator walkway is composed of steel gangboards at intervals of 3m, and a horizontal scissor support is lapped below the operator walkway;
Steel base plates are arranged below the vertical rod bases at the bottoms of the left main screen panel buckling frame and the right main screen panel buckling frame, and the steel base plates are fully paved;
and steel gangboards, steel buckle frames and safety nets are arranged at the front sides of the middle steel structure, the left channel steel structure frame and the right channel steel structure frame at intervals of 3m, and the safety nets are fully hung along the length direction.
Preferably, the lower part of the front side of the middle steel structure is provided with an equipment room.
Preferably, the left main screen panel buckling frame and the right main screen panel buckling frame are symmetrically distributed on two sides of the middle steel structure, and the left channel steel structure frame and the right channel steel structure frame are symmetrical about the middle steel structure.
Preferably, a first lateral operation boarding lane and a second lateral operation boarding lane are arranged on the front side of the left main screen panel buckling frame.
Preferably, the steel is buckled the frame and is buckled the vertical steel column drawknot with middle part steel construction, left side passageway steel structure frame and right side passageway steel structure frame respectively, the safety net is located the steel and detains the top of frame, the steel springboard that middle part steel construction, left side passageway steel structure frame and right side passageway steel structure frame correspond is located the top of safety net.
Preferably, the vertical rod at the vertical rod rack of the installation position of the projection device is sawed.
Preferably, the bottoms of the vertical rods of the middle steel structure, the left channel steel structure frame and the right channel steel structure frame are fixedly connected with a beam raft foundation, and the beam raft foundation is fixedly connected with the steel base plate.
Preferably, the top of frame, left side passageway steel structure frame, right side main screen dish knot frame and right side passageway steel structure frame all is provided with the grudging post frame, the front side of grudging post frame is provided with spotlight and projection equipment.
Preferably, galvanized light high-strength steel is used for the frame body of the steel structure, and the chemical components of the light high-strength steel in mass fraction are as follows: c: 1.0-1.2%, Mn: 15-23 wt%, Al: 14 to 16 percent of Nb, 0.01 to 0.2 percent of Nb, less than or equal to 0.03 percent of S, less than or equal to 0.03 percent of P, and the balance of Fe.
The construction process of the ultrahigh overweight eccentric demonstration large-screen fixing structure comprises the following steps:
s1: according to the construction method of the beam-raft foundation, the reinforced concrete foundation construction is sequentially carried out according to the sequence of the middle steel structure foundation, the right side steel channel steel structure frame foundation and the left side steel structure frame foundation, and the full laying and fixing of the steel tie plates are completed in the period;
s2: mounting a middle steel structure, sequentially dividing the middle steel structure into 1-8 shafts from left to right, and using 25t crane stations on the left side and the right side of the reinforced concrete foundation of the middle steel structure foundation; firstly, building a first section of central steel frame from 4-axis and 5-axis directions; secondly, expanding and installing the first section of built central steel frame to the left and right sides to the 2-axis and the 7-axis; thirdly, upwards mounting second central steel section frames with 4 shafts and 5 shafts; fourthly, the erected second section of central steel frame is extended to the left side and the right side and is installed to the 3-axis and the 6-axis; fifthly, continuously expanding a first section of steel frame with 1 shaft and 8 shafts and a second section of steel frame with 2 shaft and 7 shaft to the left and right sides; sixthly, replacing the 100t crane, and installing a 4-shaft and 5-shaft third-section central steel frame by using a 50.4m main arm and a 10.8m auxiliary arm; seventhly, expanding the left side and the right side to 3 shafts and 6 shafts; eighthly, detaching the auxiliary arms of the crane, and continuously expanding and installing a third section of steel frames of 2 shafts and 7 shafts to the left and right by using a main arm of 50.4 m; ninth, the crane moves forwards, and a second section and a third section of steel frames of the 1 shaft and the 8 shafts are sequentially supplemented from back to front;
S3: installing a side channel steel structure frame, wherein the installation process of the left channel steel structure frame is consistent with that of the right channel steel structure frame, and the left channel steel structure frame is divided into ABCDE axes from front to back; the method comprises the following steps of firstly, installing a first section of steel frame of an E shaft and a first section of steel frame of a D shaft; secondly, expanding and installing a C-axis steel frame towards the west by taking the D axis as a reference; thirdly, mounting a second section of steel frame of the E shaft and the D shaft; fourthly, mounting a third section of steel frame of the E shaft and the D shaft; fifthly, mounting a first section of a B shaft and a second section of a C shaft steel frame; sixthly, mounting a first section of an A shaft, a second section of a B shaft and a third section of a C shaft steel frame; seventhly, mounting a third section of steel frame of the B shaft; eighthly, sequentially mounting a first section and a second section of the steel frame of the A shaft;
s4: and (3) building a left main screen panel buckling frame and a right main screen panel buckling frame on the steel base plate, paving a wood plate above the panel buckling horizontal rod in the process, and placing a precast concrete weight block on the wood plate.
(III) advantageous effects
The invention provides a super-high overweight eccentric demonstration large screen fixing structure and a construction process. The method has the following beneficial effects:
according to the invention, the steel structure as disclosed by the invention is built, the arrangement requirement of a large-scale ultrahigh overweight eccentric demonstration large screen can be met, the structure is stable, and the bearing capacity of a site foundation is ensured not to exceed 10t/m after the steel structure is built 2The integral display screen is arranged in an arc shape, can be watched at a full view angle, and has reasonable structural arrangement and reservationThe vehicle passage does not delay normal passing after being erected, and the lifting mechanism in the hollow passage is used for lifting a specific mark (such as a badge).
According to the invention, the galvanized light high-strength steel is used as a construction material, so that the lightning protection and structural strength requirements are met, and the steel has outstanding corrosion resistance, so that the maintenance after construction can be effectively reduced.
Drawings
FIG. 1 is a plan view of a main frame of the present invention;
FIG. 2 is a front elevational view of the main frame of the present invention;
FIG. 3 is a side view of the first steel structure of the present invention;
FIG. 4 is a second side view of the mid-section steel structure of the present invention;
FIG. 5 is a schematic view of a worker at the fairway of the present invention;
FIG. 6 is a schematic view of a man-riding track in operation according to the present invention;
FIG. 7 is a schematic view of a horizontal scissor support of the present invention;
FIG. 8 is a schematic view of the middle steel passage handling frame of the present invention;
FIG. 9 is a schematic view of a left main panel buckle rack channel handling rack of the present invention;
FIG. 10 is a schematic view of a right-side main panel buckle rack channel handling rack of the present invention;
fig. 11 is a bottom weight method view of the disc fastener frame of the present invention.
Wherein, 1, a middle steel structure; 2. an equipment room; 3. a worker riding way; 4. the left main screen plate is buckled with the frame; 5. the first lateral operation gets on the riding track; 6. the second side direction operation is carried out on the riding track; 7. a left channel steel structure frame; 8. a display screen; 9. a right channel steel structural frame; 10. the right main screen plate is buckled with the frame; 11. the middle part is operated to get on the horse way; 12. spotlight; 13. a projection device; 14. a steel gangplank; 15. supporting the horizontal scissors; 16. a safety net; 17. a steel buckle frame; 18. a hollow channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The application provides a super-high overweight eccentric demonstration large screen fixing structure built by adopting a light high-strength steel material and a building process, and the super-high overweight eccentric demonstration large screen fixing structure comprises a middle steel structure, wherein a left main screen panel buckling frame is lapped on the left side of the middle steel structure, a left channel steel structure frame is lapped on the left side of the left main screen panel buckling frame, a right main screen panel buckling frame is lapped on the right side of the middle steel structure, and a right channel steel structure frame is lapped on the right side of the right main screen panel buckling frame;
According to some embodiments of the application, a middle operation boarding path is arranged on the front side of the middle steel structure, a hollow channel is arranged in the middle of the middle steel structure, and a lifting mechanism is arranged inside the hollow channel;
according to some embodiments of the present application, display screens are arranged on the front sides of the middle steel structure, the left main screen panel buckling frame, the left channel steel structure frame, the right main screen panel buckling frame and the right channel steel structure frame;
according to some embodiments of the application, an operator walkway is arranged at the front side of the left main screen panel buckling frame and the right main screen panel buckling frame and at the rear side of the display screen, the operator walkway is composed of steel gangboards at intervals of 3m, and a horizontal scissor support is lapped below the operator walkway;
according to some embodiments of the present application, steel tie plates are disposed below the vertical rod bases at the bottoms of the left main screen panel buckling frame and the right main screen panel buckling frame, and the steel tie plates are fully paved;
according to some embodiments of the application, the front side of middle part steel construction, left side passageway steel structure frame and right side passageway steel structure frame sets up interval 3m and has steel springboard, steel to detain frame and safety net, the safety net is followed long to hanging entirely. The steel buckling frame is a buckling type steel pipe scaffold, and refers to a scaffold and a support frame which are erected for building construction and bear load and are composed of steel pipes, buckles and the like.
According to some embodiments of the application, the lower part of the front side of the middle steel structure is provided with an equipment room.
According to some embodiments of the present application, the left side main panel buckle frame and the right side main panel buckle frame symmetrically distribute the two sides of the middle steel structure, and the left side channel steel structure frame and the right side channel steel structure frame are symmetrical about the middle steel structure.
According to some embodiments of the application, a first lateral job boarding walkway and a second lateral job boarding walkway are provided on the front side of the left main screen panel buckle rack.
According to some embodiments of the application, the steel is detained the frame and is tied with the vertical steel column drawknot of middle part steel construction, left side passageway steel structure frame and right side passageway steel structure frame respectively, the safety net is located the steel and detains the top of frame, the steel springboard that middle part steel construction, left side passageway steel structure frame and right side passageway steel structure frame correspond is located the top of safety net.
According to some embodiments of the application, the pole at the pole stand of the projection device mounting location is sawn off.
According to some embodiments of this application, the pole bottom fixedly connected with roof beam raft formula basis of middle part steel construction, left side channel steel structure frame and right side channel steel structure frame, roof beam raft formula basis and steel tie plate fixed connection.
According to some embodiments of the application, the top of frame is buckled to main screen dish in left side, left side passageway steel structure frame, main screen dish in right side and detains frame and right side passageway steel structure frame all is provided with the grudging post frame, the front side of grudging post frame is provided with spotlight and projection equipment.
In some embodiments, to super high overweight eccentric demonstration large-size screen fixed knot construct, there may be the limited condition of place area when putting up, consequently the steel construction left and right sides steel construction can set up to irregular shape, makes overall structure compacter to this satisfies the place requirement. The irregular structure is not limited in the application, and any possible irregular structure can be adopted under the condition of meeting the requirements of safety and stability.
In this applicationThe steel construction and the dish are detained the frame and are all used galvanized light high strength steel, and what the steel construction adopted is shaped steel, what the dish was detained the frame and was adopted is the steel pipe, and light high strength steel's chemical composition mass fraction is: c: 1.0-1.2%, Mn: 15-23 wt%, Al: 14 to 16 percent of Nb, 0.01 to 0.2 percent of Nb, less than or equal to 0.03 percent of S, less than or equal to 0.03 percent of P and the balance of Fe, and the density is less than 6.5g/cm3The yield strength is 1000-1200 MPa, the tensile strength is 1100-1300 MPa, and the elongation is more than 20%.
Furthermore, 3-5% of Cr is added into the light high-strength steel, so that the corrosion resistance of the steel is improved, the steel is in a fully-austenitic structure, and nano-scale K carbides which are uniformly dispersed and distributed exist in austenite grains.
Further, the surface of the light high-strength steel is galvanized for lightning protection in special weather, such as lightning weather, and the safety of the whole structure and site personnel is ensured.
The construction process of the ultrahigh overweight eccentric demonstration large screen fixing structure comprises the following steps:
s1: according to the construction method of the beam raft foundation, the reinforced concrete foundation construction is sequentially carried out according to the sequence of the middle steel structure foundation, the right side steel channel steel structure frame foundation and the left side steel structure frame foundation, and the full laying and fixing of the steel tie plates are completed in the period;
s2: mounting a middle steel structure, sequentially dividing the middle steel structure into 1-8 shafts from left to right, and using 25t crane stations on the left side and the right side of the reinforced concrete foundation of the middle steel structure foundation; firstly, building a first section of central steel frame from 4-axis and 5-axis directions; secondly, expanding and installing the first section of built central steel frame to the left and right sides to the 2-axis and the 7-axis; thirdly, upwards mounting second central steel section frames with 4 shafts and 5 shafts; fourthly, the erected second section of central steel frame is extended to the left side and the right side and is installed to the 3-axis and the 6-axis; fifthly, continuously expanding a first section of steel frame with 1 shaft and 8 shafts and a second section of steel frame with 2 shaft and 7 shaft to the left and right sides; sixthly, replacing the 100t crane, and installing a 4-shaft and 5-shaft third-section central steel frame by using a 50.4m main arm and a 10.8m auxiliary arm; seventhly, expanding the left side and the right side to 3 shafts and 6 shafts; eighthly, detaching the auxiliary arms of the crane, and continuously expanding and installing a third section of steel frames of 2 shafts and 7 shafts to the left and right by using a main arm of 50.4 m; ninth, the crane moves forwards, and a second section and a third section of steel frames of the 1 shaft and the 8 shafts are sequentially supplemented from back to front;
S3: installing a side channel steel structure frame, wherein the installation process of the left side channel steel structure frame is consistent with that of the right side channel steel structure frame, and the left side channel steel structure frame is divided into an ABCDE shaft from front to back; the method comprises the following steps of firstly, installing a first section of steel frame of an E shaft and a first section of steel frame of a D shaft; secondly, expanding and installing a C-axis steel frame towards the west by taking the D axis as a reference; thirdly, mounting a second section of steel frame of the E shaft and the D shaft; fourthly, mounting a third section of steel frame of the E shaft and the D shaft; fifthly, mounting a first section of a B shaft and a second section of a C shaft steel frame; sixthly, mounting a first section of an A shaft, a second section of a B shaft and a third section of a C shaft steel frame; seventhly, mounting a third section of steel frame of the B shaft; eighthly, sequentially mounting a first section and a second section of the steel frame of the A shaft;
s4: and (3) building a left main screen panel buckling frame and a right main screen panel buckling frame on the steel base plate, paving a wood plate above the panel buckling horizontal rod in the process, and placing a precast concrete weight block on the wood plate.
Example one
The embodiment of the invention provides an ultra-high overweight eccentric demonstration large screen fixing structure built by adopting a light high-strength steel material and a building process, the structure comprises a middle steel structure 1, the specific structure of the middle steel structure corresponds to that of figures 3 and 4, an equipment machine room 2 is arranged at the lower part of the front side of the middle steel structure 1 and is a control machine room of a display screen 8, a projection equipment 13 and a spotlight 12, a 50cm multiplied by 50cm wire outlet is reserved in the equipment machine room 2, a left main screen panel buckling frame 4 is lapped at the left side of the middle steel structure 1, a left channel steel structure frame 7 (the structure of which is shown in figure 9) is lapped at the left side of the left main screen panel buckling frame 4, a right main screen panel buckling frame 10 is lapped at the right side of the middle steel structure 1, a right channel steel structure frame 9 (the structure of which is shown in figure 10) is lapped at the right side of the right main screen panel buckling frame 10, and the left main screen panel buckling frame 4 and the right main screen panel buckling frame 10 are symmetrically distributed at two sides of the middle steel structure 1, left side passageway steel structure frame 7 and right side passageway steel structure frame 9 are about 1 symmetry of middle part steel construction, middle part steel construction 1, the pole setting bottom fixedly connected with beam raft formula basis of left side passageway steel structure frame 7 and right side passageway steel structure frame 9, beam raft formula basis and steel backing plate fixed connection, the thickness of beam raft formula basis is not less than 600m, can improve holistic stability like this, left side main panel detains frame 4 and right side main panel and detains frame 10 and all has the pole setting, the horizontal plate is detained the pole and is detained oblique pull rod overlap joint and form with the dish, annotate: all buckle diagonal draw bars must be drawn and connect to the main node, if can't draw and tie to the main node, must increase two-way horizon bar in diagonal draw bar's position department, vehicle passageway is reserved to the below of left side passageway steel structure frame 7 and right side passageway steel structure frame 9, reserves bottom passageway and hollow passageway 18 in the middle part steel construction 1, and the inside of hollow passageway 18 is provided with the elevating system that the specific sign (such as badge) of going up and down was used.
The front side of the middle steel structure 1 is provided with a middle operation boarding horse way 11, the front side of the left main screen plate buckling frame 4 is provided with a first lateral operation boarding horse way 5 and a second lateral operation boarding horse way 6, and the structures of the middle operation boarding horse way 11, the first lateral operation boarding horse way 5 and the second lateral operation boarding horse way 6 are shown in fig. 6.
The front sides of the middle steel structure 1, the left main screen panel buckling frame 4, the left channel steel structure frame 7, the right main screen panel buckling frame 10 and the right channel steel structure frame 9 are all provided with a display screen 8.
The front sides of the left main screen panel buckling frame 4 and the right main screen panel buckling frame 10 and the rear side of the display screen 8 are provided with an operator walkway 3, namely an operation frame, the corresponding structure of the operation frame is shown in fig. 5, safety nets 16 with the height of 1.5m are arranged around all the operator walkways and the operation frame, the operator walkway 3 is composed of steel gangboards 14 with the interval of 3m, horizontal scissor supports 15 are lapped below the operator walkway 3, as shown in fig. 7, the horizontal scissor supports 15 are close to the main nodes as far as possible, and safety nets 16 can be laid on the upper sides and the lower sides of the horizontal scissor supports 15 according to actual safety requirements.
The left main screen panel is buckled frame 4 and right main screen panel and is buckled frame 10 bottom pole setting base's below and be provided with the steel backing plate, the steel backing plate is full paved, the left main screen panel is buckled frame 4 and right main screen panel and is buckled the base and the steel backing plate welding of two back pole setting belows in the first three of frame 10 bottom and back, the plank is laid and precast concrete ballast piece is put on the plank to the top that the frame 10 bottom dish was buckled to left main screen panel knot frame 4 and right main screen panel, can improve holistic stability like this, the concrete ballast piece that is located the rear side is every striden 5t along length direction, the precast concrete ballast piece that is located the front side is every striden 3t along length direction, its corresponding content is as shown in fig. 11.
The steel gangway 14, the steel buckle frame 17 and the safety net 16 are arranged at the front side interval 3m of the middle steel structure 1, the left channel steel structure frame 7 and the right channel steel structure frame 9, and all the safety nets 16 are large-hole safety nets.
The steel buckling frame 17 is respectively connected with the vertical steel columns of the middle steel structure 1, the left channel steel structure frame 7 and the right channel steel structure frame 9 in a pulling mode, the safety net 16 is located above the steel buckling frame 17, the steel gangboards 14 corresponding to the middle steel structure 1, the left channel steel structure frame 7 and the right channel steel structure frame 9 are located above the safety net 16, and the safety net 16 is fully hung in the length direction.
When all the vertical rods are lapped, the joint positions are required to be staggered, the bolts at the joints of the vertical rods are required to be installed, and other fixing measures are required to be taken at the positions where the vertical rods cannot be installed.
The specific flow of the construction flow of the ultrahigh overweight eccentric demonstration large-screen fixed structure is as follows:
s1: according to the construction method of the beam-raft foundation, the reinforced concrete foundation construction is sequentially carried out according to the sequence of the middle steel structure foundation, the right side steel channel steel structure frame foundation and the left side channel steel structure frame foundation, the full laying and fixing of a steel base plate are completed in the period, before the construction, at the cavity positions of an electric well, a water well, a ditch and the like on the existing site, the well edge is larger than 300mm, fixed and 20mm high, battens with the width of 60mm are fixed, 2cm thick sand is fully laid from the battens to the well edge, a 2cm thick steel plate is laid on the upper portion, sponge strips are used between the steel plate and the battens for sealing, the mortar is strictly prevented from flowing into a well, the bottom of the outer steel plate of the battens is filled with the mortar according to the matching ratio of the concrete of the same foundation, in the range of 2m horizontal height of the anti-explosion ditch, the top wall is reinforced at the position of 2/3 height from the bottom of the side wall in the ditch, and the horizontal distance of 300mm adopts steel short vertical rods for matching with a top support, and the batten and the two side walls of the anti-explosion ditch are tightly pressed against the anti-explosion ditch;
s2: mounting a middle steel structure, sequentially dividing the middle steel structure into 1-8 shafts from left to right, and using 25t crane stations on the left side and the right side of the reinforced concrete foundation of the middle steel structure foundation; firstly, building a first section of central steel frame from 4-axis and 5-axis directions; secondly, expanding and installing the first section of built central steel frame to the left and right sides to the 2-axis and the 7-axis; thirdly, upwards mounting second central steel section frames with 4 shafts and 5 shafts; fourthly, the erected second section of central steel frame is extended to the left side and the right side and is installed to the 3-axis and the 6-axis; fifthly, continuously expanding a first section of steel frame with 1 shaft and 8 shafts and a second section of steel frame with 2 shaft and 7 shaft to the left and right sides; sixthly, replacing the 100t crane, and installing a 4-shaft and 5-shaft third-section central steel frame by using a 50.4m main arm and a 10.8m auxiliary arm; seventhly, expanding the left side and the right side to 3 shafts and 6 shafts; eighthly, detaching the auxiliary arms of the crane, and continuously expanding and installing a third section of steel frames of 2 shafts and 7 shafts to the left and right by using a main arm of 50.4 m; ninth, the crane moves forwards, and a second section and a third section of steel frames of the 1 shaft and the 8 shafts are sequentially supplemented from back to front;
S3: installing a side channel steel structure frame, wherein the installation process of the left channel steel structure frame is consistent with that of the right channel steel structure frame, and the left channel steel structure frame is divided into ABCDE axes from front to back; the method comprises the following steps of firstly, installing a first section of steel frame of an E shaft and a first section of steel frame of a D shaft; secondly, expanding and installing a C-axis steel frame towards the west by taking the D axis as a reference; thirdly, mounting a second section of steel frame of the E shaft and the D shaft; fourthly, mounting a third section of steel frame of the E shaft and the D shaft; fifthly, mounting a first section of a B shaft and a second section of a C shaft steel frame; sixthly, mounting a first section of an A shaft, a second section of a B shaft and a third section of a C shaft steel frame; seventhly, mounting a third section of steel frame of the B shaft; eighthly, sequentially mounting a first section and a second section of the steel frame of the A shaft;
s4: and (3) building a left main screen panel buckling frame and a right main screen panel buckling frame on the steel base plate, paving a wood plate above the panel buckling horizontal rod in the process, and placing a precast concrete weight block on the wood plate.
According to functional partitioning, structural forms and the like, the ultrahigh overweight eccentric demonstration large screen fixing structure provided by the invention is divided into a main screen frame middle steel structure, a main screen frame left side channel steel structure, a main screen frame right side channel steel structure, a main screen frame (disc buckling frame) structure, a first auxiliary screen frame (disc buckling frame), a second auxiliary screen frame (disc buckling frame) and a second auxiliary screen frame channel steel structure. The main screen is of a middle steel structure, the length of the main screen is 27.8m, the width of the main screen is 11.9m, the height of the main screen is 36m, a space grid structure system is adopted, steel beams for the screen and steel beams for the hanging device are rigid joints, and other steel beams and supports are mainly hinged joints. The steel column base is mainly connected rigidly, the foundation is composed of a hidden beam and a raft (600 thick), and the foundation is placed on a stadium. And carrying out structural analysis by adopting a three-dimensional model, and calculating a steel structure and a foundation. For the intermediate steel structure, the loads include constant loads, live loads and wind loads. Wherein the content of the first and second substances,
1. Constant load:
(a) the structure is self-weight, and the node weight is considered by enlarging 1.2.
(b) Adding a constant load: 1) and (3) screen weight: 0.4kN/m2(ii) a 2) More than 6.5m, 1.5m on one side of the screen strides the load of the operation frame: 2kN/m2(ii) a 3) Light load (top two rows of rails): 1kN/m
2. Live load:
the top three-layer screen with one side 1.5m is spanned with the human load: 1kN/m236m level important devices: 320kN
3. Wind load:
1) basic wind pressure: 0.3kN/m2, roughness of ground class D
2) The wind vibration coefficient is calculated according to a related formula in GB50009-2012
3) System coefficient: 1.3.
through analysis and calculation, the horizontal displacement under the action of 1.0 wind load is 4.56mm of maximum top displacement, the height is 36m, the displacement angle is 1/7895, and the design standard of 1/250 is met. And for the checking calculation of the strength and stability of the rod piece, the stress ratio of the steel member is less than 0.4, the maximum slenderness ratio of the column is 94.9, and the maximum slenderness ratio of the steel beam to the supporting slenderness ratio is 149. The total structural wind load value is 313kN, the steel structure dead weight and constant load (without foundation) are 5134kN, the ratio of wind to constant load is 0.06, and the friction coefficient between the foundation and the ground is more than 0.1, so that the anti-slip requirement is met. The stadium field bearing capacity limit is 100kN/m 2. According to the foundation bearing capacity checking calculation result, the maximum pressure of the foundation is 66kPa <100kPa, so that the structure meets the bearing capacity requirement of a site. The minimum pressure of the base is 7.7kPa, and no zero stress area exists, so that the anti-overturning requirement is met. Deleting 4 truss columns at the D axis, and under the working condition of 2.0 constant +0.2 wind, deleting the components directly related to the columns, wherein the stress ratio is 0.646 maximum; under the working condition of 1.0 constant +0.2 wind, the stress ratio of other components is 0.47 at maximum; under the working condition of 2.0 constant +0.2 wind, the maximum displacement is 18 mm; and the requirement of continuous collapse resistance is met.
The main screen frame left side passageway steel construction, length 17m, wide 11m, high 39m adopt space grid structure system, except that the girder steel for the screen adopts rigid connection node, other girder steels, support are given first place to articulated node. The steel column base is in rigid connection, the foundation is in the form of a hidden beam and a raft (600 thick), and the foundation is placed on a stadium. And (5) performing structural analysis by adopting a three-dimensional model, and calculating a steel structure and a foundation. For the middle steel structure, the loads include constant loads, live loads and wind loads. Wherein, the first and the second end of the pipe are connected with each other,
1. constant load:
(a) the structure is self-weight, and the node weight is considered by enlarging 1.2.
(b) Adding a constant load: 1) screen weight (kN/m)2): 0.4; 2) more than 6.5m, 1.5m on one side of the screen span the load of the operation frame (kN/m)2): 2; 3) two-layer screen side girder steel lighting equipment load in top: 2 kN/m.
2. Live load:
the top three-layer screen with one side 1.5m is spanned with the human load: 1kN/m2。
3. Wind load:
1) basic wind pressure: 0.3kN/m2, roughness of ground class D
2) The wind vibration coefficient is calculated according to a related formula in GB50009-2012
3) System coefficient: 1.3.
through analysis and calculation, the horizontal displacement is realized under the action of 1.0 wind loadThe maximum displacement of the top is 10mm, the height is 39m, and the displacement angle is 1/3900, so that the design standard of 1/250 is met. The rod strength and stability are calculated by checking that the stress ratio of the steel member is less than 0.3, the maximum length-to-thin ratio of the column is 73, and the maximum length-to-thin ratio of the steel beam and the support is 160. The total structural wind load value is 195kN, the self weight and constant load (without foundation) of the steel structure are 2881kN, the ratio of wind to constant load is 0.067, and the friction coefficient between the foundation and the ground is more than 0.1, so that the anti-slip requirement is met. The limit value of the bearing capacity of the stadium is 100kN/m 2. According to the checking calculation result of the bearing capacity of the foundation, the maximum pressure of the foundation is 60.4kPa<100kPa, the superstructure meets the load bearing requirements of the site. The minimum pressure of the base is 7.8kPa, and no zero stress area exists, so that the anti-overturning requirement is met. Deleting the steel columns at the positions of the axis 2 and the axis C, and under the working condition of 2.0 constant plus 0.2 wind, deleting components directly related to the columns, wherein the stress ratio is less than 1; under the working condition of 1.0 constant +0.2 wind, the stress ratio of other components is less than 1; under the working condition of 2.0 constant +0.2 wind, the maximum displacement is 13 mm; and the requirement of continuous collapse resistance is met.
The right side of the main screen frame is of a channel steel structure, the length of the channel steel structure is 17m, the width of the channel steel structure is 8m, the height of the channel steel structure is 39m, a space grid structure system is adopted, steel beams for the screen are rigid-connection nodes, and other steel beams and supports are mainly hinged nodes. The steel column base is in rigid connection, the foundation is composed of a hidden beam and a raft (600 thick), and the foundation is placed on a stadium. And carrying out structural analysis by adopting a three-dimensional model, and calculating a steel structure and a foundation. For the intermediate steel structure, the loads include constant loads, live loads and wind loads. Wherein the content of the first and second substances,
1. constant load:
(a) the structure is self-weight, and the node weight is considered by enlarging 1.2.
(b) Adding a constant load: 1) screen weight (kN/m)2): 0.4; 2) more than 6.5m, 1.5m on one side of the screen span the load of the operation frame (kN/m) 2): 2; 3) two-layer screen side girder steel lighting equipment load in top: 2 kN/m.
2. Live load:
the top three-layer screen with one side 1.5m is spanned with the human load: 1kN/m2。
3. Wind load:
1) basic wind pressure: 0.3kN/m2, roughness of ground class D
2) The wind vibration coefficient is calculated according to a related formula in GB50009-2012
3) System coefficient: 1.3.
through analysis and calculation, the horizontal displacement under the action of 1.0 wind load is 13.6mm of the maximum displacement of the top, the height is 39m, the displacement angle is 1/2867, and the design standard of 1/250 is met. The results of the checking calculation of the strength and stability of the rod piece are that the stress ratio of the steel member is less than 0.4, the maximum slenderness ratio 73 of the column, and the maximum slenderness ratio 160 of the steel beam and the support. The total structural wind load value is 195kN, the steel structure dead weight and constant load (without foundation) are 2340kN, the ratio of wind to constant load is 0.083, and the friction coefficient between the foundation and the ground is more than 0.1, so that the anti-slip requirement is met. The limit value of the bearing capacity of the stadium is 100kN/m2. According to the checking calculation result of the bearing capacity of the foundation, the maximum pressure of the foundation is 59kPa<100kPa, so the superstructure meets the load bearing requirements of the site. The minimum pressure of the base is 7.9kPa, and no zero stress area exists, so that the anti-overturning requirement is met. Deleting the steel columns at the positions of the axis 2 and the axis C, and under the working condition of 2.0 constant plus 0.2 wind, deleting components directly related to the columns, wherein the stress ratio is less than 1; under the working condition of 1.0 constant +0.2 wind, the stress ratio of other components is less than 1; under the working condition of 2.0 constant +0.2 wind, the maximum displacement is 13mm, and the requirement of continuous collapse resistance is met.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a big screen fixed knot of superelevation overweight eccentric demonstration constructs which characterized in that: the left side of the middle steel structure is lapped with a left main screen panel buckling frame, the left side of the left main screen panel buckling frame is lapped with a left channel steel structure frame, the right side of the middle steel structure is lapped with a right main screen panel buckling frame, and the right side of the right main screen panel buckling frame is lapped with a right channel steel structure frame;
a middle operation boarding passageway is arranged on the front side of the middle steel structure, a hollow channel is arranged in the middle of the middle steel structure, and a lifting mechanism is arranged inside the hollow channel;
the display screens are arranged on the front sides of the middle steel structure, the left main screen panel buckling frame, the left channel steel structure frame, the right main screen panel buckling frame and the right channel steel structure frame;
an operator walkway is arranged at the front side of the left main screen panel buckling frame and the right main screen panel buckling frame and is positioned at the rear side of the display screen, the operator walkway is composed of steel gangboards at intervals of 3m, and a horizontal scissor support is lapped below the operator walkway;
Steel base plates are arranged below the vertical rod bases at the bottoms of the left main screen panel buckling frame and the right main screen panel buckling frame, and the steel base plates are fully paved;
and the front sides of the middle steel structure, the left channel steel structure frame and the right channel steel structure frame are provided with a steel springboard, a steel buckle frame and a safety net at certain intervals, and the safety net is fully hung along the length direction.
2. The ultrahigh overweight eccentric demonstration large screen fixing structure according to claim 1, characterized in that: and an equipment room is arranged at the lower part of the front side of the middle steel structure.
3. The ultra-high overweight eccentric demonstration large screen fixing structure according to claim 1, characterized in that: the left side main screen dish is detained the frame and the both sides of frame symmetric distribution middle part steel construction are detained to the right side main screen dish, left side passageway steel structure frame and right side passageway steel structure frame are symmetrical about the middle part steel construction.
4. The ultrahigh overweight eccentric demonstration large screen fixing structure and the construction process according to claim 1, characterized in that: the front side of the left main screen panel buckling frame is provided with a first lateral operation boarding lane and a second lateral operation boarding lane.
5. The ultra-high overweight eccentric demonstration large screen fixing structure according to claim 1, characterized in that: the steel is detained the frame and is detained the vertical steel column drawknot with middle part steel construction, left side passageway steel structure frame and right side passageway steel structure frame respectively, the safety net is located the steel and detains the top of frame, the steel springboard that middle part steel construction, left side passageway steel structure frame and right side passageway steel structure frame correspond is located the top of safety net.
6. The ultrahigh overweight eccentric demonstration large screen fixing structure according to claim 1, characterized in that: and the vertical rod at the vertical rod frame at the mounting position of the projection equipment is sawed.
7. The ultrahigh overweight eccentric demonstration large screen fixing structure according to claim 1, characterized in that: the pole setting bottom fixed connection of middle part steel construction, left side passageway steel structure frame and right side passageway steel structure frame has roof beam raft formula basis, roof beam raft formula basis and steel tie plate fixed connection.
8. The ultrahigh overweight eccentric demonstration large screen fixing structure according to claim 1, characterized in that: the top that frame, left side passageway steel structure frame, right side main screen dish were buckled frame and right side passageway steel structure frame were all provided with the grudging post frame to left side main screen dish, the front side of grudging post frame is provided with spotlight and projection equipment.
9. The ultra-high overweight eccentric demonstration large screen fixing structure according to claim 1, characterized in that: the frame body of steel construction all uses galvanized light weight high strength steel, the chemical composition mass fraction of light weight high strength steel is: c: 1.0 to 1.2%, Mn: 15-23 wt%, Al: 14 to 16 percent of Nb, 0.01 to 0.2 percent of Nb, less than or equal to 0.03 percent of S, less than or equal to 0.03 percent of P, and the balance of Fe.
10. The construction process of the ultrahigh overweight eccentric demonstration large-screen fixing structure is characterized by comprising the following steps:
s1: according to the construction method of the beam-raft foundation, the reinforced concrete foundation construction is sequentially carried out according to the sequence of the middle steel structure foundation, the right side steel channel steel structure frame foundation and the left side steel structure frame foundation, and the full laying and fixing of the steel tie plates are completed in the period;
s2: mounting a middle steel structure, sequentially dividing the middle steel structure into 1-8 shafts from left to right, and using 25t crane stations on the left side and the right side of the reinforced concrete foundation of the middle steel structure foundation; firstly, building a first section of central steel frame from 4-axis and 5-axis directions; secondly, expanding and installing the first section of built central steel frame to the left and right sides to the 2-axis and the 7-axis; thirdly, upwards mounting second central steel section frames with 4 shafts and 5 shafts; fourthly, the erected second section of central steel frame is extended to the left side and the right side and is installed to the 3-axis and the 6-axis; fifthly, continuously expanding a first section of steel frame with 1 shaft and 8 shafts and a second section of steel frame with 2 shaft and 7 shaft to the left and right sides; sixthly, replacing the 100t crane, and installing a 4-shaft and 5-shaft third-section central steel frame by using a 50.4m main arm and a 10.8m auxiliary arm; seventhly, expanding the left side and the right side to 3 shafts and 6 shafts; eighthly, detaching the auxiliary arms of the crane, and continuously expanding and installing a third section of steel frames of 2 shafts and 7 shafts to the left and right by using a main arm of 50.4 m; ninth, the crane moves forwards, and a second section and a third section of steel frames of the 1 shaft and the 8 shafts are sequentially supplemented from back to front;
S3: installing a side channel steel structure frame, wherein the installation process of the left side channel steel structure frame is consistent with that of the right side channel steel structure frame, and the left side channel steel structure frame is divided into an ABCDE shaft from front to back; the method comprises the following steps of firstly, installing a first section of steel frame of an E shaft and a first section of steel frame of a D shaft; secondly, expanding and installing a C-axis steel frame towards the west by taking the D axis as a reference; thirdly, mounting a second section of steel frame of the E shaft and the D shaft; fourthly, mounting a third section of steel frame of the E shaft and the D shaft; fifthly, mounting a first section of a B shaft and a second section of a C shaft steel frame; sixthly, mounting a first section of an A shaft, a second section of a B shaft and a third section of a C shaft steel frame; seventhly, mounting a third section of steel frame of the B shaft; eighthly, sequentially mounting a first section and a second section of the steel frame of the A shaft;
s4: and (3) building a left main screen panel buckling frame and a right main screen panel buckling frame on the steel base plate, paving a wood plate above the panel buckling horizontal rod in the process, and placing a precast concrete weight block on the wood plate.
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